#include "Comm.hpp"

static void getMessage(int fd)
{
    char buffer[SIZE];
    while(true)
    {
        memset(buffer, '\0', sizeof(buffer));
        ssize_t s = read(fd, buffer, sizeof(buffer) - 1);
        if(s > 0)
        {
            cout << "["  << getpid() << "] " << "client say> " << buffer << endl;
        }
        else if(s == 0) // 客户端退出
        {
            // end of file
            cerr << "["  << getpid() << "] " << "read end of file, client quit, server quit too!!!" << endl;
            break;
        }
        else
        {
            perror("read error");
            exit(3);
        }
    }
}

int main()
{
    // 1. 创建管道文件
    if(mkfifo(ipcPath.c_str(), MODE) < 0)
    {
        perror("mkfifo");
        exit(1);
    }
    Log("创建管道文件成功", Debug) << "step 1" << endl;

    // 2. 正常的文件操作
    int fd = open(ipcPath.c_str(), O_RDONLY);
    if(fd < 0)
    {
        perror("server open");
        exit(2);
    }
    Log("打开管道文件成功", Debug) << "step 2" << endl;

    int nums = 3;
    for(int i = 0; i < nums; ++i)
    {
        pid_t id = fork();
        if(id == 0)
        {
            // 3. 编写正常的通信代码
            getMessage(fd);
            exit(1);
        }
    }

    for(int i = 0; i < nums; ++i)
    {
        // -1表示等待任意一个子进程
        waitpid(-1, nullptr, 0);
    }

    // 4. 关闭管道文件
    close(fd);
    Log("关闭管道文件成功", Debug) << "step 3" << endl;

    // 5. 删除管道文件
    unlink(ipcPath.c_str());
    Log("删除管道文件成功", Debug) << "step 4" << endl;

    return 0;
}

